CN101951812B - Chair - Google Patents
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- CN101951812B CN101951812B CN200880124858.1A CN200880124858A CN101951812B CN 101951812 B CN101951812 B CN 101951812B CN 200880124858 A CN200880124858 A CN 200880124858A CN 101951812 B CN101951812 B CN 101951812B
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- chair
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Abstract
A chair whose seat (5) slides in a sinking backward direction accompanying the back tilting of a backrest (7) having an elastically deformable back shell (71) as its main body. A back-supporting rod (6) whose lower end is pivotally supported by a support base part (3) disposed under the seat (5) and which supports the back shell (71) has an upper back frame (61) which supports a section above a lumber support part (71L) out of the back shell (71) wherein the lumber support part (71L) is capable of supporting the waist of a seated person, and a lower back frame (62) which supports a section near the lower end of the back shell (71). The back frames (the upper back frame (61) and the lower back frame (62)) are pivotally attached to each other and the pivotally attaching point (a third spindle (X3)) is arranged behind the lower end of the back shell (71). Thus, with the back tilting of the upper back frame (61) relative to the lower back frame (62) around the pivotally attaching point (the third spindle (X3)), the back shell (71) so generally curve-deforms as to make the lumber support part (71L) relatively projected forward.
Description
Technical field
The present invention relates to the chair of locating to use suitably in office etc.
Background technology
In the past, as the chair of locating to use suitably in office etc., known have be accompanied by the hypsokinesis action, seat support of backrest can be to the slide chair of mobile so-called genlocing (synchro locking) function of the direction rearward declining.
As an example of such chair, can be listed below described chair (for example, with reference to following patent documentation 1): support coupler body (back shell) by backrest pole, the bottom of this backrest pole is forwards extended, can be around horizontal rotational shaft ground pivotal support in the support base on top that is arranged at chair pin by its elongated end, be accompanied by backrest pole and the correspondingly action of hypsokinesis of load that puts on coupler body, with in coupler body, can support seated person waist lumbal branch support part (lumbarsupport portion) forwards outstanding mode make coupler body flexural deformation.
In following patent documentation 1, technical scheme as described below is disclosed: the axle that the top of backrest (coupler body) can be supported in rotatably to the top that is arranged at backrest pole, and in the bottom below of the left and right sides of backrest portion, fixedly there is side respectively and sees the prerotation vane of the cam path of L shape, action bars is operated and the oblique plate that is arranged at integratedly this action bars is moved in cam path, can adjust thus the overhang that forwards give prominence to described lumbal branch support part.
Patent documentation 1: JP 2004-49719 communique
Summary of the invention
But, above-mentioned chair in the past need to be used for the special mechanism that lumbal branch support part is forwards given prominence to, and causes the complicated of structure, and requires seated person (user) to operate especially, also need the time just can be accustomed to the use of, there is the poor problem of practicality.
In addition, above-mentioned chair is the chair with the genlocing function of hypsokinesis action, the seat support interlock that is accompanied by backrest, on the other hand, be not there is the chair that makes coupler body flexural deformation and only make backrest inclination (back tilting) function of backrest hypsokinesis.Even combined above-mentioned structure on the chair with backrest inclination function, must be used for making forwards outstanding special mechanism's this point and to require seated person (user) to operate especially this point same, practicality or poor of lumbal branch support part.
The present invention is conceived to such problem and carries out, main purpose is the chair of the practicality excellence that provides as described below: not only have genlocing function, also there is backrest inclination function, do not need for never the common state of backrest imposed load being made in the time that the backrest inclination state that only makes backrest hypsokinesis moves forwards outstanding special mechanism of lumbal branch support part, can seek the simplification of structure, and need not require seated person to carry out the special operation for lumbal branch support part is forwards given prominence to.
, chair of the present invention, that the chair linking is moved in hypsokinesis that seat support is accompanied by the backrest forming taking coupler body that can strain as main body, it is characterized in that: near bottom or bottom position by pivotal support be disposed at described seat support below support base, support the backrest pole of described coupler body, comprise: support ratio in described coupler body can support the upper backrest framework at position closer to the top, the lumbal branch support part of waist of seated person and support the bottom of described coupler body or bottom near the lower back framework at position, these backrest framework pivot joints each other, this pivoting point is set in the rear of the bottom side of described coupler body, be accompanied by the action with respect to the hypsokinesis of described lower back framework centered by this pivoting point of described upper backrest framework, described coupler body is so that the relatively forwards outstanding mode integrally bending distortion of described lumbal branch support part.
Chair if so, become and have that seat support is accompanied by the hypsokinesis action of backrest and the genlocing function of interlock and make coupler body flexural deformation and only make the chair of the backrest inclination function of backrest hypsokinesis, and pivoting point is set in the rear of the bottom side of coupler body, this pivoting point is that in other words the position more closer to the top than lumbal branch support part of supporting in coupler body be the pivoting point of the upper backrest framework on top of coupler body and near the lower back framework at the position in bottom or bottom of support coupler body, so consciously body weight is put on the top of coupler body at seated person, the hypsokinesis centered by described pivoting point of upper backrest framework, follow the upper side in this coupler body rearward bending, its result, region between top and the bottom of coupler body is specifically the automatically flexural deformation in forwards outstanding direction of lumbal branch support part, can give seated person with good lumbar support sense.And, with body weight is put on coupler body top degree correspondingly, the overhang that forwards give prominence to lumbal branch support part also changes, so needn't operate in addition special operating portion, change the mode that applies of self body weight by seated person, this overhang can be set as to the overhang of the lumbal branch support part that can obtain good lumbar support sense, become the simplification chair of harmless any practicality simultaneously of realizing structure.
Like this, do not need to be provided for to make forwards outstanding special mechanism of lumbal branch support part, so can effectively realize the simplification of structure, and do not need to carry out for making the forwards outstanding special operation of lumbal branch support part or for adjusting the special operation of overhang of lumbal branch support part, so for seated person ease of use excellence yet.
Especially, if be made as: the backrest framework of any one party in described upper backrest framework and described lower back framework possesses the over-hang part (overhangportion) extending from described pivoting point to predetermined direction, between this over-hang part and the opposing party's backrest framework, dispose the hypsokinesis action that is accompanied by described upper backrest framework and the elastomer that produces reaction force; Can make upper backrest framework move special counter-force mechanism compactness with respect to the backrest inclination of the independent hypsokinesis of lower back framework.
In order to prevent interfering the protrusion that suppresses forwards to protrude lumbal branch support part and be out of shape due to lumbal branch support part and upper backrest framework, preferably be made as: between the described lumbal branch support part of described upper backrest framework and described coupler body, the diastrophic space of the described coupler body while forming the hypsokinesis action that allows described backrest.
And then, if be made as: at least one party in described upper backrest framework and described lower back framework supports described coupler body with the state that can engage slidably and movingly in short transverse; The top, upper backrest framework that at seated person, body weight is put on to coupler body is centered by pivoting point when hypsokinesis, coupler body slides mobile in short transverse with respect to the backrest framework of at least one party in upper backrest framework and lower back framework, can successfully carry out thus the flexural deformation of coupler body entirety for backrest pole.
In addition, if form as described below: dispose and comprise backrest pole described in described upper backrest framework and described lower back framework one group in the left and right of described coupler body width substantial middle portion; The both side ends of coupler body becomes state freely, even be the intensity that coupler body is configured to the back load that can support seated person by resinous tabular component, when the both ends, left and right at coupler body are applied with load, can be correspondingly flexibly bending significantly with this load.Like this, allow the torsional deflection of coupler body, can carry out and the mode that applies of body weight of seated person and/or the 3 D deformation of the corresponding coupler body of action of back.
For the top, upper backrest framework that body weight are put on to coupler body at seated person are centered by pivoting point when hypsokinesis, in order to make the distortion of coupler body integrally bending make lumbal branch support part forwards outstanding reliably simultaneously, it is preferred: for the deformation characteristic to described coupler body is given direction, in the described lumbal branch support part of described coupler body, be provided with than the distortion of the easier local deformation in periphery position of this lumbal branch support part and cause unit.
Cause the preferred technical scheme of unit as distortion, can enumerate the scheme that forms described distortion and cause unit by the one or more grooves that extend on the left and right width at described coupler body.
Bright as mentioned above, according to the present invention, can provide the chair of practicality excellence as described below: not only there is genlocing function, also there is backrest inclination function, do not need in the time never the common state of backrest imposed load being moved to the backrest inclination state that only makes backrest hypsokinesis, make forwards outstanding special mechanism of lumbal branch support part, can seek the simplification of structure, and not require that seated person carries out the special operation for lumbal branch support part is forwards given prominence to.
Brief description of the drawings
Fig. 1 is the overall diagram of the chair relevant with an embodiment of the invention from oblique forward observation.
Fig. 2 is the overall diagram of observing the chair relevant with this embodiment from oblique rear.
Fig. 3 is the side view of the chair in common state in this embodiment.
Fig. 4 is the rearview of the chair in common state in this embodiment.
Fig. 5 omits a part of Fig. 3 and the Action Specification figure of expression.
Fig. 6 is that directions X in Fig. 5 is to view.
Fig. 7 is a part of Fig. 5, is the figure that only represents coupler body by width central longitudinal cross section, left and right model utility.
Fig. 8 is the coupler body in Y region of model utility presentation graphs 5 and the figure of the installation form of backrest pole.
Fig. 9 makes and the figure that represent corresponding with Fig. 3 of the chair in genlocing state in this embodiment.
Figure 10 makes and the figure that represent corresponding with Fig. 5 of the chair in genlocing state in this embodiment.
Figure 11 makes and the figure that represent corresponding with Fig. 3 of the chair in backrest inclination state in this embodiment.
Figure 12 makes and the figure that represent corresponding with Fig. 5 of the chair in backrest inclination state in this embodiment.
Figure 13 is the figure that makes a variation of the mechanism that is slidably matched in this embodiment and model utility corresponding with Fig. 5 and Figure 12 and represent.
Label declaration
1: chair 3: support base 5: seat support
6: backrest pole 61: upper backrest framework 612: over-hang part
62: lower back framework 63: elastomer (the 2nd helical spring)
7: backrest 71: coupler body 713: distortion causes unit
713a: groove 71L: lumbal branch support part X3: pivoting point (the 3rd fulcrum)
Detailed description of the invention
Below, with reference to the accompanying drawings of an embodiment of the invention.
The chair 1 relevant with present embodiment, as shown in Fig. 1～Fig. 5, is so-called rotating chair, comprising: chair pin 2; Can horizontally rotate the support base 3 of the upper end side that is installed on chair pin 2; Front portion is supported on the seat support holder portion 4 of support base 3; Be installed on the seat support 5 of seat support holder portion 4; Bottom is articulated in support base 3 and supports the backrest pole 6 at the rear portion of seat support holder portion 4; With the backrest 7 that is installed on backrest pole 6.
Chair pin 2 is included in that top possesses respectively many (being 5 in the illustrative example) feets (pin pen feather) 21 of castor and the chair pin pillar 22 that erects from the position of the base end part set of each pin sheet 21 forms.
Support base 3 is as shown in Fig. 6 (this figure is the figure that represents the state of observing from the arrow directions X Fig. 5), for for example metal, possess upper wall portions 31, from the both side edges of this upper wall portions 31 bending sagging a pair of sagging side wall portion 32 and be arranged at a pair of partition wall 33,34 working as ribs between the leading section of a pair of sagging side wall portion 32 integratedly respectively, the upper end of chair pin pillar 22 is installed in the rearward end of described upper wall portions 31, and the rearward end of described upper wall portions 31 is supported on chair pin pillar 22.In addition, the partition wall 33 that relatively leans on rear side in a pair of partition wall 33,34, be provided with baffle plate (retainer) the guide part 33a that is arranged in wall thickness direction, the baffle plate 912b that is inserted through this baffle plate guide part 33a is led, make to advance and retreat in its advance and retreat of compression at helical spring 911 described later direction.In addition, this support base 3 is slightly being leaned between the position of rear side than the substantial middle portion of the sagging side wall portion 32 of left and right, and crossbearer has the 1st fulcrum X1 of pivotal support back of the body pole 6 rotationally.And then, at the leading section of the sagging side wall portion 32 of left and right, in wall thickness direction, be equipped with respectively the slotted hole 32a of the front baffle (diagram is omitted) for supporting seat support holder described later portion 4.Support base 3 from below be coated with support base lid 3c, can not directly observe from the outside (with reference to Fig. 3).
Seat support holder portion 4 is configured in the top of described support base 3, and the state that is inserted through the slotted hole 32a of support base 3 to be arranged at the not shown bar-shaped front baffle of leading section is supported on support base 3.The chair 1 of present embodiment possesses the handrail 8 extending upward respectively near the position edge, the left and right sides of seat support holder portion 4.Handrail 8 shown in Fig. 1 etc. can not be adjusted height, but also can replace this handrail, and application can be adjusted the handrail of height.In addition, can be also not have armed chair.
Seat support 5 possesses: play as the seat support housing 51 that supports equably the effect of the structure member of the load that puts on this seat support 5, be arranged at the seat support bolster (diagram is omitted) of the top of this seat support housing 51, and cover the seat support impact-absorbing shell 52 of seat support bolster.
Backrest 7 possesses: play as the coupler body 71 effect, that supported by backrest pole 6 that supports equably the structure member of the load that puts on this backrest 7, be arranged at the backrest bolster (diagram is omitted) in the front of coupler body 71, and cover the backrest impact-absorbing shell 72 of this backrest bolster.
Coupler body 71 is taking resinous elasticity plate body as main body forms, be formed as top and bottom than short transverse central portion more outstanding and edge, the left and right sides than more forwards outstanding 3D shape of left and right width central portion.Ratio in coupler body 71 can support the lumbal branch support part 71L of waist of seated person region closer to the top, more specifically in the short transverse central portion region closer to the top than coupler body 71, being provided with multiple openings 711, is that aperture opening ratio is set to such an extent that become gradually large towards rising wood and the edge, both sides of coupler body 71 by opening 711 in the shared ratio of the presumptive area of coupler body 71.In the following description, the overall region that is provided with opening 711 in coupler body 71 is called to " coupler body top 71T ".; coupler body 71 as shown in Figure 4, etc.; have integratedly: coupler body top 71T; the short transverse central portion of coupler body 71 is coupler body central portion 71S; be positioned at than the lumbal branch support part 71L of coupler body central portion 71S position slightly on the lower, and be coupler body bottom 71U than lumbal branch support part 71L region on the lower.The curvature of the flexure plane of overlooking of coupler body central portion 71S, lumbal branch support part 71L and coupler body bottom 71U is identical, and this curvature is set greatlyr than the curvature of the flexure plane of overlooking of coupler body top 71T.And, as Fig. 7, (this figure is corresponding with Fig. 5, the figure that only represents coupler body 71 with width central longitudinal cross section, left and right model utility) shown in, coupler body central portion 71S, the lumbal branch support part 71L that curvature is relatively large and coupler body bottom 71U become and bend to interconnected arc shape, on the other hand, the coupler body top 71T that curvature is relatively little forms roughly linearity along short transverse.In addition, coupler body central portion 71S and coupler body top 71T are continuous mutually as border taking line of discontinuity 712.
At the lumbal branch support part of coupler body 71 71L, be provided with than the distortion of the easier local deformation in periphery position of this lumbal branch support part 71L and cause unit 713.In the present embodiment, cause unit 713 as distortion, applied the groove 713a extending on the width of left and right.It can be also multiple that the number of groove 713a can be one, in the present embodiment, is provided with the upper and lower a pair of groove 713a across predetermined space in short transverse.
At coupler body top 71T, as Fig. 8, (this figure is for the coupler body 71 in the Y region of presentation graphs 5 and the combination of backrest pole 6, model utility represents coupler body top 71T to be assembled in the figure of the state in the preorder stage of backrest pole 6) shown in, one or be fully provided with integratedly rearward holding section 714 outstanding, that can engage with the hole 611 that is slidably fastened of upper end that is formed at upper backrest framework 61 described later.In addition, in Fig. 8, the opening 711 of shell on the back top 71T has been omitted.Holding section 714 is probably formed as bulk, has integratedly flange part 714a in top ends (from the back side of coupler body 71 away from the end of a side).
At coupler body bottom 71U, as shown in Fig. 5 waits, one or the abundant supported portion 715 that is provided with integratedly the upper end of rearward giving prominence to and be supported on bottom described later framework.In the present embodiment, the bottom that is coupler body 71 in the bottom of coupler body bottom 71U is provided with the laminal supported portion 715 of pair of right and left.
Support the backrest pole 6 of such coupler body 71 as shown in Fig. 5 waits, possess: upper backrest framework 61, it supports the lumbal branch support part 71L specifically described coupler body top 71T of position closer to the top of the waist of the ratio support seated person in coupler body 71; With the lower back framework 62 that supports coupler body bottom 71U, be configured to, the pivoting point (the 3rd fulcrum X3 described later) of these upper backrest frameworks 61 and lower back framework 62 is set in the rear of the bottom side of described coupler body 71, and upper backrest framework 61 can be carried out tilting action (tilting operation) with respect to lower back framework 62 centered by this pivoting point.In addition, as shown in Figure 2, in upper backrest framework 61 and lower back framework 62, respectively from rear or below be coated with upper backrest framework lid 61c and lower back framework lid 62c, can not directly observe from the outside.
Lower back framework 62, as shown in Fig. 5 and Fig. 6 etc., possesses: configure than the two sides of support base 3 pair of right and left lower back framework body 621 more in the outer part; With the bottom of this pair of lower back framework body 621 is rigidly connected to each other and configures than rigid connecting shaft 622 more on the lower below described support base 3.
Each lower back framework body 621 roughly forms tabular, and from bottom, near upper end, extend to oblique rear gradually at position, has near the side-glance shape of position, upper end towards the bending of oblique front.
Rigid connecting shaft 622 is formed as bar-shaped, by the suitable methods such as welding with across state be fixed between the bottom of lower back framework body 621.
For such lower back framework 62 is installed on to support base 3, under the state pair of right and left lower back framework body 621 being rigidly connected by rigid connecting shaft 622, start to be adjacent to from the rear of support base 3 near position mode each other support base 3 being clipped in to the bottom of each lower back framework body 621, under the state interconnecting near the inserting hole 621a at the position bottom that makes to be arranged at each lower back framework body 621 and the not shown inserting hole of two sagging side wall portions 32 that is arranged at support base 3, the 1st fulcrum X1 is inserted wherein, install.Thus, lower back framework 62 and even backrest pole 6 can be rotated with respect to support base 3 centered by the 1st fulcrum X1.In addition, in the present embodiment, near the bottom of each lower back framework body 621, position is provided with the extension 621b more forwards extending than other position integratedly, is formed with inserting hole 621a at each extension 621b.The 1st fulcrum X1 configures relatively by rear and top side with respect to rigid connecting shaft 622.
The chair 1 relevant with present embodiment, be installed in lower back framework 62 under the state of support base 3, the rigid connecting shaft 622 of lower back framework 62 is positioned than (specifically below sagging side wall portion 32) below support base 3 more on the lower, disposes the hypsokinesis action that is accompanied by backrest pole 6 and the helical spring 911 that produces reaction force between this rigid connecting shaft 622 and support base 3.And, be configured to, at lower back framework 62, centered by described the 1st fulcrum X1 when hypsokinesis, rigid connecting shaft 622 loads helical spring 911 to the direction of savings bounce.
Specifically, as shown in Figure 6, rigid connecting shaft 622, is supported with a distolateral 911x of helical spring seat portion who is arranged at helical spring 911 described later at its length direction central portion.Helical spring 911 and the 911x of helical spring seat portion are configured for adjusting the inclination reaction force adjusting device 9 of the reaction force while making 6 hypsokinesis of backrest pole.
Inclination reaction force adjusting device 9, as shown in Fig. 5 and Fig. 6, possesses: in support base 3, be accommodated with at least a portion and produce independently the reaction force generating unit 91 of the reaction force while making 6 hypsokinesis of backrest pole with seat support holder portion 4; Be arranged at seat support 5 lateral margin front, for adjusting the operating portion 92 for reaction force adjustment of reaction intensity of force of operation reaction force generating unit 91.
If more particularly, reaction force generating unit 91 possesses: helical spring 911; With compression elongated portion 912, this compression elongated portion be arranged at this helical spring 911 the distolateral and adjustment operations linkage accepted with described reaction force adjustment operating portion 92 make described helical spring 911 compress or extend.Compression elongated portion 912 comprises: the adjustment operations linkage of accepting with described reaction force adjustment operating portion 92, with the orthogonal direction of the compression prolonging direction of helical spring 911 on advance and retreat overlook roughly trapezoidal sliding part 912a; With respect to this sliding part 912a slide and support described helical spring 911 while on described compression prolonging direction, advance and retreat overlook roughly trapezoidal baffle plate (retainer) 912b; With the described baffle plate guide part 33a that this baffle plate 912b is led to the advance and retreat of described compression prolonging direction.33a is described above for this baffle plate guide part, is formed at the partition wall 33 of the support base 3 for supporting seat support holder portion 4.
Reaction force adjustment possesses with operating portion 92: connect the sagging side wall portion 32 of any one party in support base 3 and the bar 921 that extends on the width of left and right, and be arranged at the top ends of this bar 921 and bar 921 is enclosed the operating handle 922 pivoting.
Turn back to the explanation of lower back framework 62.At each lower back framework body 621 of lower back framework 62, be provided with integratedly the 2nd extension 621c forwards extending than periphery position than short transverse central portion position slightly on the lower, by support the rear end side of described seat support holder portion 4 to be fixed on these the 2nd extension 621c the 2nd fulcrum X2 each other across state.And then near the position upper end of each lower back framework body 621, can not be changed angle and be fixed with the supported portion 715 of described coupler body 71 relatively by suitable parts such as threaded fasteners.
By pivotal support in be formed as such structure lower back framework 62 upper end upper backrest framework 61 as shown in Figure 5, have and be sandwiched in described pair of right and left lower back framework body 621 width dimensions each other, be formed as upper end and bottom than more rearward outstanding roughly " く " shape of side-looking of short transverse central portion.In the upper end of upper backrest framework 61, as shown in Figure 8, be formed with and be arranged at the hole 611 that is slidably fastened that the described holding section 714 of coupler body top 71T can be slidably fastened.The hole 611 that is slidably fastened comprises: the flange part 714a of holding section 714 can insert the 611a of macropore portion of taking-up and above the 611a of this macropore portion continuously and the 611b of aperture portion arranging can allow holding section 714 relative slidings to move the state that the 611b of this aperture portion does not depart from the flange part 714a inserting from the 611a of macropore portion.The height dimension of the 611b of aperture portion is set greatlyr than the height dimension of the 611a of macropore portion, and surplus is moved with the relative sliding of holding section 714 in the hole 611 of guaranteeing to be slidably fastened.
Be formed with the not shown inserting hole connecting on the width of left and right in the bottom of upper backrest framework 61, under the state that this inserting hole and the inserting hole 621d of upper end that is arranged at each lower back framework body 621 are interconnected, the 3rd fulcrum X3 is inserted wherein, upper backrest framework 61 can be carried out hypsokinesis action centered by the 3rd fulcrum X3 (being equivalent to " pivoting point " of the present invention) thus.In the present embodiment, be set as the 3rd fulcrum X3 and be configured in the rear of the bottom side of coupler body 71.And then, upper backrest framework 61 possesses the over-hang part 612 extending than described pivoting point (the 3rd fulcrum X3) downwards, between this over-hang part 612 and lower back framework 62, dispose the hypsokinesis action that is accompanied by upper backrest framework 61 and conduct elastomeric the 2nd helical spring 63 of the present invention that produces reaction force.In the present embodiment, described in ratio in the pair of right and left lower back framework body 621 of lower back framework 62 near bending upper end position slightly on the lower side position each other, to be fixed with the 4th fulcrum X4 across state, an end of supporting the 2nd helical spring 63 at the 4th fulcrum X4, the other end of the 2nd helical spring 63 is supported on the over-hang part 612 of upper backrest framework 61.
Be supported on respectively under the state of the upper end of upper backrest framework 61 and the upper end of lower back framework 62 at coupler body top 71T and coupler body bottom 71U, between coupler body 71 and backrest pole 6 (being specifically upper backrest framework 61), be formed with space.
Next, describe for using method and the effect of the chair 1 relevant with present embodiment being formed by above-mentioned each member.
The chair 1 relevant with present embodiment at least can be in following state: as shown in Fig. 1～Fig. 5, backrest 7 is in erecting the common state (S) of posture; As shown in Fig. 9 and Figure 10, hypsokinesis action, the seat support 5 that is accompanied by backrest 7 links and to the direction rearward declining mobile genlocing (the synchronously tilting) state (R) that slides; With as shown in Figure 11 and Figure 12, be arc backrest reflex action state (T) by consciously body weight being put on to the top of backrest 7, make upper backrest framework 61 hypsokinesis centered by the 3rd fulcrum X3 (pivoting point of the present invention), follow in the overall side-looking flexural deformation of this coupler body 71 at the common lower seated person of state (S).
In common state (S) in the situation that, the coupler body 71 forming taking elasticity plate body as main body overcomes its elasticity and is formed as side-looking and is bent into arc shape.
In the case of chair 1, the seated person of the common state (S) with respect in such lean against on backrest 7 by back entirety, as shown in figure 10, backrest pole 6 maintains the relative angle hypsokinesis centered by described the 1st fulcrum X1 unchangeably of upper backrest framework 61 and lower back framework 62, also hypsokinesis of coupler body 71.Now, the body weight of seated person roughly puts on backrest 7 entirety equably, so upper backrest framework 61 can be with respect to 62 hypsokinesis of lower back framework, in other words, upper backrest framework 61 does not change with the relative angle of lower back framework 62, hypsokinesis that coupler body 71 is also keeping the shape roughly the same shape lower with common state (S).Be accompanied by the hypsokinesis action of this backrest pole 6, the described seat support holder portion 4 that supports rear end side by described the 2nd fulcrum X2 of lower back framework 62 makes to be arranged at that the front framework (diagram is omitted) of its leading section is mobile in slotted hole 32a moves to the direction slip rearward declining on one side.Its result, the direction that seat support 5 entirety and the seat support holder portion 4 being supported by seat support holder portion 4 rearward decline to equidirectional is slided mobile (with reference to Fig. 9), and chair 1 becomes genlocing state (R).
In addition, in genlocing state (R) in the situation that, the rigid connecting shaft 622 of lower back framework 62 is pressed described helical spring 911 to the direction of savings bounce, so seated person by back from backrest 7 when sitting up above the waist, by the bounce of helical spring 911, make backrest pole 6 entirety automatically return to the described common posture before hypsokinesis.In the present embodiment, can adjust the reaction force while making backrest 7 hypsokinesis by described inclination reaction force adjusting device 9.Specifically, in the time that operating handle 922 for example, is rotated to any one direction (clockwise) clockwise or counterclockwise, with its interlock, sliding part 912a is to moving close to the direction of operating handle 922, and this sliding part 912a presses baffle plate 912b.So the baffle plate 912b being pressed by sliding part 912a moves to the direction of compression helical spring 911, can increase the reaction force while making backrest 7 hypsokinesis.On the other hand, for example, if make operating handle 922 (counterclockwise) rotation in the opposite direction, the reaction force just can reduce to make backrest 7 hypsokinesis time.
On the other hand, when in the situation that the lower seated person of state (S) puts on body weight coupler body top 71T consciously conventionally, as shown in figure 12, the upper backrest framework 61 in backrest pole 6 centered by the 3rd fulcrum X3 with respect to 62 hypsokinesis of lower back framework.Be accompanied by the hypsokinesis action of this upper backrest framework 61, on the coupler body top 71T being supported by upper backrest framework 61 in coupler body 71, effect will make its rearward power of bending, on the other hand, the bottom of the coupler body 71 being supported by lower back framework 62 is maintained at the position under common state (S) by the lower back framework 62 of not hypsokinesis, thus coupler body 71 so that the position between coupler body top 71T and coupler body bottom 71U further the forwards outstanding further flexural deformation of mode be arc.In the present embodiment, the lumbal branch support part of coupler body 71 71L be provided with distortion cause unit 713, specifically for groove 713a, so be deformed into when arc at coupler body 71 integrally bendings, lumbal branch support part 71L is to the Direction distortion of the open height of shortening groove 713a, its result, this lumbal branch support part 71L with compare in the situation of common state (S) relatively forwards outstanding.In addition, in the present embodiment, coupler body top 71T engages and is supported in upper backrest framework 61 in mode that can relative sliding moves in short transverse, in the time of 61 hypsokinesis of upper backrest framework, the described holding section 714 that makes to be arranged at coupler body top 71T in the scope not being disengaged in hole 611, in the fastening state in the hole 611 that is slidably fastened with respect to this that is slidably fastened of upper end that is formed at upper backrest framework 61 in short transverse relative sliding move, coupler body 71 entirety can be followed the hypsokinesis action of upper backrest framework 61 and flexural deformation thus.The chair 1 of present embodiment is for making the upper end form that relative sliding moves on the 71T of coupler body top of upper backrest framework 61, wherein, the position of other in the ratio of curvature coupler body 71 of the flexure plane of overlooking of coupler body top 71T is little, be formed as roughly linearity along short transverse, moves so can carry out swimmingly this slip under stable state.
Be accompanied by chair 1 and shift from common state (S) to backrest inclination state (T), the over-hang part 612 of upper backrest framework 61 is pressed the 2nd helical spring 63 between this over-hang part 612 and lower back framework 62 to the direction of savings bounce.Therefore, seated person by back from backrest 7 when sitting up above the waist, by the bounce of the 2nd helical spring 63, make upper backrest framework 61 automatically restore to the common posture before hypsokinesis, chair 1 turns back to common state (S) from backrest inclination state (T).In addition, in the time that chair 1 shifts from common state (S) to backrest inclination state (T), than the shape under common state (S) also flexural deformation be the elastic recovering force of arc coupler body 71, as working forwards retracting the power loading in the direction of upper backrest framework 61.Therefore, at chair 1 in backrest inclination state (T) in the situation that, in the time that seated person puts on body weight lumbal branch support part 71L consciously, described loading force further increases, the bounce of this loading force and described the 2nd helical spring 63 is added, seated person by back from backrest 7 when sitting up above the waist, upper backrest framework 61 is followed this action and is automatically restored to immediately the common state before hypsokinesis.
In addition, chair 1 shifts from common state (S) to backrest inclination state (T), when seated person further puts on body weight backrest 71 entirety, being that upper backrest framework 61 keeps the posture with respect to 62 hypsokinesis of lower back framework on one side, is lower back framework 62 hypsokinesis centered by described the 1st fulcrum X1 on one side.Its result, chair 1 becomes the retroverted state (diagram is omitted) of backrest inclination state (T) and genlocing state (R) combination.Substantially same therewith, shifting from common state (S) to genlocing state (R), in the time that seated person further puts on upper backrest framework 61 by body weight consciously, upper backrest framework 61 with respect to 62 hypsokinesis of lower back framework, becomes the retroverted state (diagram is omitted) of genlocing state (R) and backrest inclination state (T) combination centered by described the 3rd fulcrum X3.
; the mode of taking one's seat of the chair relevant with present embodiment 1 and seated person, more specifically say body weight the mode that applies correspondingly; the centre of 2 states that can be different in common state (S), genlocing state (R), backrest inclination state (T), retroverted state or these states is intermediateness (for example state (S) and the intermediateness of genlocing state (R) or the conventionally intermediateness of state (S) and backrest inclination state (T) conventionally, diagram is omitted).
In addition, the chair 1 of present embodiment possesses and is arranged at inclination brake apparatus A between backrest pole 6 and support base 3, that can carry out selectively the tilting action of backrest 7.Inclination brake apparatus A, the bottom of this inclination brake apparatus A can swingingly be supported on the rear end side of support base 3, the upper end of inclination brake apparatus A can swingingly be supported on the 4th fulcrum X4 of lower back framework 62, in the present embodiment, as inclination brake apparatus A, be suitable for and possess gas spring body A1 cylindraceous roughly and for being accommodated in piston rod portion advance and retreat in this gas spring body A1 known gas spring (diagram omission), that work as inclination detent by entirety roughly, omit detailed explanation.
Like this, the chair 1 relevant with present embodiment becomes and can be accompanied by the hypsokinesis action of backrest 7 and the genlocing state (R) of interlock only makes the chair 1 of the backrest inclination state (T) that backrest 7 tilts with making coupler body 71 flexural deformations in seat support 5, and the position of supporting the top side of ratio lumbal branch support part 71L in coupler body 71 is specifically the rear that the upper backrest framework 61 of coupler body top 71T and the pivoting point (the 3rd fulcrum X3) that supports the lower back framework 62 of the bottom of coupler body 71 are set in the bottom side of coupler body 71, when so seated person puts on body weight on the top of coupler body 71 consciously, upper backrest framework 61 hypsokinesis centered by pivoting point (the 3rd fulcrum X3), follow in this, upper side in coupler body 71 is rearward bending, its result, the direction flexural deformation that more particularly lumbal branch support part 71L forwards gives prominence to from trend of region between top and the bottom of coupler body 71, can give seated person with good lumbar support sense.And, with body weight put on coupler body 71 top degree correspondingly, the overhang that lumbal branch support part 71L forwards gives prominence to also changes, so needn't operate in addition special operating portion, change the mode that applies of the body weight of self by seated person, just this overhang can be set as to the overhang of the lumbal branch support part 71L that can obtain good lumbar support sense, become the simplification chair of harmless any practicality simultaneously of realizing structure.
Especially, upper backrest framework 61 possesses the over-hang part 612 extending than pivoting point (the 3rd fulcrum X3) downwards, between this over-hang part 612 and lower back framework 62, dispose the hypsokinesis action that is accompanied by upper backrest framework 61 and the elastomer (the 2nd helical spring 63) that produces reaction force, so the counter-force mechanism compactness that can make backrest inclination use, can effectively avoid the maximization and complicated of structure.
In addition, set in the mode that is formed with space between the lumbal branch support part 71L at upper backrest framework 61 and coupler body 71, so can prevent from reliably interfering and suppressing lumbal branch support part 71L and forwards protrude the situation of distortion due to lumbal branch support part 71L and upper backrest framework 61.
Upper backrest framework 61 is supported for coupler body 71 state that can engage slidably and movingly in short transverse, so the top that consciously body weight is put on to coupler body 71 at seated person makes upper backrest framework 61 centered by pivoting point (the 3rd fulcrum X3) when hypsokinesis, coupler body 71 slides in short transverse with respect to upper backrest framework 61 to move and allows thus coupler body top 71T rearward bending, can carry out smoothly the deformed movement of coupler body 71 integrally bending archwises.
In addition, dispose the one group of backrest pole 6 being formed by upper backrest framework 61 and lower back framework 62 in the left and right of coupler body 71 width substantial middle portion, so the both side ends of coupler body 71 becomes opening, the torsional deflection of coupler body 71 can be allowed, the three-dimensional deflection deformation with the corresponding coupler body 71 of the mode that applies of the body weight of seated person can be carried out.In addition, in the present embodiment, be formed with multiple peristomes 711 at coupler body top 71T, so the existence of these multiple peristomes 711 goes far towards to support near the realization of the level and smooth torsional deflection of the coupler body top 71T shoulder of seated person.If furthermore, with opening 711, in the shared ratio of presumptive area, to be aperture opening ratio become large mode gradually sets towards the upper edge of coupler body 71 and dual-side edge, also contributes to the level and smooth diastrophic realization of coupler body top 71T.
In order to give direction to the deformation characteristic of coupler body 71, at the lumbal branch support part of coupler body 71 71L, be provided with than the distortion of the easier local deformation in periphery position of lumbal branch support part 71L and cause unit 713, so when hypsokinesis, can make coupler body 71 integrally bendings distortion make lumbal branch support part 71L forwards give prominence to reliably on one side in upper backrest framework 61 centered by pivoting point (the 3rd fulcrum X3).Especially, in the present embodiment, form distortion by the multiple groove 713a that extend on the left and right width at coupler body 71 and cause unit 713, cause unit 713 so can realize distortion by extremely simple method.
In addition, the embodiment that the present invention is not limited to describe in detail above.
For example, in said embodiment, form exemplified with as described below: upper backrest framework 61 possesses the over-hang part 612 extending from pivoting point (the 3rd fulcrum X3) to predetermined direction, between over-hang part 612 and lower back framework 62, dispose the hypsokinesis action that is accompanied by upper backrest framework 61 and the elastomer (the 2nd helical spring 63) that produces reaction force; But also can replace in this, be made as form as described below: lower back framework is made as to the over-hang part possessing from further for example, extending to predetermined direction (top) with the pivoting point of upper backrest framework, between this over-hang part and upper backrest framework, dispose the hypsokinesis action that is accompanied by upper backrest framework and the elastomer that produces reaction force.
In addition, produce the elastomer of reaction force as being accompanied by the hypsokinesis action of upper backrest framework, also can apply left and right width so-called helical spring and/or the rubber that roughly the mutual Cong Zhou in consistent, both ends extends at center in the opposite direction of direction of principal axis and chair.And then, be arranged at the over-hang part of the framework of any one party in upper backrest framework or lower back framework, the hypsokinesis that can certainly be accompanied by upper backrest framework is moved and the elastomer between over-hang part and the opposing party's framework is stretched to the direction of savings bounce.
In addition, in said embodiment, exemplified with upper backrest framework 61, coupler body top 71T is supported for to the form of the state that can engage slidably and movingly in short transverse, but also can replace in this, lower back framework by the lower support of coupler body be can be in short transverse the state of engaging slidably and movingly, or in upper backrest framework and lower back framework any one by coupler body be supported for can be in short transverse the state of engaging slidably and movingly.; can be that the mechanism that is slidably fastened that allows the relative sliding of coupler body and backrest pole to move is only arranged to the form between upper backrest framework and coupler body; or be only arranged between lower back framework and coupler body, or be arranged at respectively the form arbitrarily in the form between each backrest framework and coupler body.And then the distances that can slide etc. are as long as correspondingly suitably carry out design alteration with specification etc.In said embodiment, exemplified with the form that engages holding section in connecting hole, but also can replace connecting hole and apply slot.And, as the mechanism that is slidably fastened, also can adopt in coupler body side and be provided with integratedly the engaging recessed part such as connecting hole or slot, be provided with on seat back frame side the form that can be slidably fastened in the engaging protuberance of engaging recessed part.As one example, as shown in figure 13, can be listed below described form: at the back side on coupler body 71 (coupler body top), only be provided with integratedly the engaging recessed part 714 ' of the pocket-like of opening downwards, on the other hand, in backrest pole (upper backrest framework 61), the side-looking that setting can be inserted in from below described engaging recessed part 714 ' is the engaging engaging protuberance 611 ' upwards of L shape, be accompanied by the hypsokinesis action of upper backrest framework 61, do not connect in the scope of removing engaging recessed part 714 ' is reduced for the amount of swallowing that engages protuberance 611 ' with the fastening state of engaging recessed part 714 ' at engaging protuberance 611 ', make thus coupler body 71 in short transverse, to slide with respect to backrest pole (upper backrest framework 61) mobile.Now, can make engaging recessed part and engage protuberance and mutually engage by making coupler body fall into backrest pole from top, can carry out simply assembling operation.
In addition, also can be made as near the position edge, both sides of coupler body or edge, both sides and dispose respectively the form of the backrest pole being formed by upper backrest framework and lower back framework., can be also the chair that possesses the group of the backrest pole that many groups (comprising more than 3 groups) be made up of upper backrest framework and lower back framework.
Cause unit as distortion, also can replace the groove extending on the width of the left and right of coupler body, and application thinner wall section (thin-walled hinge), from the both side edges of the coupler body notch that width central authorities cut to the left and right respectively and/or along the left and right width of coupler body uniformly-spaced or multiple holes of arranging, compartment of terrain.
In addition, lower back framework also can not support the bottom of coupler body and support near position bottom.
In addition, be also not limited to above-mentioned embodiment for the concrete structure of each several part, can carry out without departing from the spirit and scope of the invention various distortion.
As mentioned above, according to the present invention, provide the chair of practicality excellence as described below: not only there is genlocing function, also there is backrest inclination function, do not need for never the common state of backrest imposed load being made in the time that the backrest inclination state that only makes backrest hypsokinesis moves forwards outstanding special mechanism of lumbal branch support part, can seek the simplification of structure, and not require that seated person carries out the special operation for lumbal branch support part is forwards given prominence to.
Claims (7)
1. a chair, is that the chair linking is moved in hypsokinesis that seat support is accompanied by the backrest forming taking coupler body that can strain as main body, it is characterized in that:
Near bottom or bottom position by pivotal support be disposed at described seat support below backrest pole support base, that support described coupler body comprise: the upper backrest framework that supports ratio in described coupler body and can support position closer to the top, the lumbal branch support part of waist of seated person; And support near the lower back framework at the position bottom of described coupler body or bottom, these backrest framework pivot joints each other, this pivoting point is set in the rear of the bottom side of described coupler body, be accompanied by described upper backrest framework centered by this pivoting point with respect to the action of described lower back framework hypsokinesis, described coupler body is so that the forwards outstanding mode integrally bending distortion compared with situation in the common state to backrest imposed load not of described lumbal branch support part.
2. chair as claimed in claim 1, wherein: the backrest framework of any one party in described upper backrest framework and described lower back framework possesses the over-hang part extending from described pivoting point to predetermined direction, between this over-hang part and the opposing party's backrest framework, dispose the hypsokinesis action that is accompanied by described upper backrest framework and the elastomer that produces reaction force.
3. chair as claimed in claim 1 or 2, wherein: between the described lumbal branch support part of described upper backrest framework and described coupler body, be formed with space.
4. chair as claimed in claim 3, wherein: at least one party in described upper backrest framework and described lower back framework engages described coupler body state in the mobile mode of can sliding in short transverse supports.
5. chair as claimed in claim 4, wherein: dispose and comprise backrest pole described in described upper backrest framework and described lower back framework one group in the left and right of described coupler body width substantial middle portion.
6. chair as claimed in claim 5, wherein: for the deformation characteristic to described coupler body is given direction, be provided with than the distortion of the easier local deformation in periphery position of this lumbal branch support part and cause unit in the described lumbal branch support part of described coupler body.
7. chair as claimed in claim 6, wherein: described distortion causes that unit is the one or more grooves that extend on the width of the left and right of described coupler body.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008007398A JP5347141B2 (en) | 2008-01-16 | 2008-01-16 | Chair |
| JP007398/2008 | 2008-01-16 | ||
| PCT/JP2008/064032 WO2009090769A1 (en) | 2008-01-16 | 2008-08-05 | Chair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101951812A CN101951812A (en) | 2011-01-19 |
| CN101951812B true CN101951812B (en) | 2014-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880124858.1A Active CN101951812B (en) | 2008-01-16 | 2008-08-05 | Chair |
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| CN (1) | CN101951812B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687958A (en) * | 2011-03-25 | 2012-09-26 | 卓岳股份有限公司 | Chair back support linkage device |
| JP5917868B2 (en) * | 2011-09-14 | 2016-05-18 | シロキ工業株式会社 | Lumber support device |
| CN109008378B (en) * | 2018-09-13 | 2024-04-05 | 安吉县盛信办公家具有限公司 | Movable support body connection structure suitable for seat |
| CN111248678A (en) * | 2018-12-03 | 2020-06-09 | 国誉家具（中国）有限公司 | Chair (Ref. TM. chair) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2507575Y2 (en) * | 1991-01-31 | 1996-08-14 | 株式会社イトーキクレビオ | Chair backrest device |
| WO2000078185A2 (en) * | 1999-06-17 | 2000-12-28 | Steelcase Inc. | Chair construction |
| JP4411413B2 (en) * | 2001-03-22 | 2010-02-10 | コクヨ株式会社 | Chair |
| JP4137536B2 (en) * | 2002-07-03 | 2008-08-20 | コクヨ株式会社 | Chair |
| ATE336187T1 (en) * | 2003-02-16 | 2006-09-15 | Stoll Sedus Ag | BACKREST |
| JP4197045B2 (en) * | 2007-08-31 | 2008-12-17 | コクヨ株式会社 | Chair |
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2008
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